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Published in Crop Sci 9:225-228 (1969)
© 1969 Crop Science Society of America
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Stability of Attractiveness of Alfalfa Clones to Honeybees under Varying Locations, Seasons, and Years1

Norbert M. Kauffeld, Edgar L. Sorensen and Reginald H. Painter2

The honeybee (Apis mellifera L.) attractiveness of five highly-preferred and five relatively nonpreferred clones of alfalfa (Medicago spp.) as selected during 2 years in two locations, remained consistent for 2 additional years (summer and fall, with and without a cage), one additional location, and with differing total numbers of bees present. The 10 clones were associated with a total of 6,825, 45, and 25 different clones at locations 1, 2, and 3, respectively, but this did not greatly alter their rank in respect to each other. Only eight of 110 attractiveness ranks disagreed with the grouping, highly preferred and least preferred. The coefficient of concordance of 15 clonal rank values was +O.702 (P < .01).

Honeybee attractiveness of 45 clones studied varied differentially with locations and years. Attractiveness of certain clones remained high and that of others low. Conversely, other clones were characterized by conspicuous attractiveness alterations over seasons, years, and locations.

The preference of honey bees for alfalfa clones in a cage paralleled that in the field (r = +0.946, P < .001).

Key Words: Medicago spp. • Apis mellifera • Pollination • Clone • Bee visitation • Preference

1 Contribution No. 970, Department of Entomology, and No. 1058, Department of Agronomy, Kansas Agricultural Experiment Station, Manhattan, and the Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture. Presented by the senior author as partial fulfillment of the requirements for the Ph.D. degree in Entomology at Kansas State University.

2 Formerly Instructor (Apiculture), Department of Entomology, Kansas State University (now Investigations Leader, Entomology Research Division, ARS, USDA, Baton Rouge, La.); Research Agronomist, CRD, ARS, USDA, Manhattan, Kans. 66502; and Professor of Entomology, Kansas State University, Manhattan.

Received for publication September 16, 1968.




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